CN106341584B - Camera module focusing production method, camera module and terminal - Google Patents
Camera module focusing production method, camera module and terminal Download PDFInfo
- Publication number
- CN106341584B CN106341584B CN201610846985.9A CN201610846985A CN106341584B CN 106341584 B CN106341584 B CN 106341584B CN 201610846985 A CN201610846985 A CN 201610846985A CN 106341584 B CN106341584 B CN 106341584B
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- China
- Prior art keywords
- camera module
- lens
- pick
- voice coil
- coil motor
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/51—Housings
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lens Barrels (AREA)
- Studio Devices (AREA)
Abstract
The embodiment of the invention provides a kind of camera module focusing production technology, camera module and terminals.The camera module focusing production technology includes: the selected first predetermined target, is focused to pick-up lens;Selected second predetermined target, starting voice coil motor push pick-up lens to carry out focusing test to the second predetermined target;The second predetermined target is carried out in focussing process in pick-up lens, records the current value x of multiple groups input voice coil motor and the moving distance value y of voice coil motor correspondingly;According to pick-up lens because of external environment caused by change distance value A, x, y, calculate and obtain cam lens and should correct the distance value B of sinking;Pick-up lens is sunk to adjusting distance value B and is solidified.The climbing algorithm climbing range consistency for solving the problems, such as that mass production camera module not can guarantee the camera module for completing check and correction to the focusing check and correction technique of camera module in the process in the prior art using the technical solution of the embodiment of the present invention is poor.
Description
Technical field
The present invention relates to field of terminal technology, and in particular, to a kind of camera module focusing production technology, camera mould
Group and terminal.
Background technique
Requirement of the consumer for camera at present is higher and higher, wherein there is a critically important index request to seek to clap
According to fast, " taking pictures fast " be converted to technical language be broadly divided into AF (Auto Focus, i.e. auto-focusing) be quickly found out clearly at
Image position and storage image are fast.With the fast development of mobile phone CPU, the speed of image has been stored to eight cores again from double-core to four cores
Through being greatly improved, optimizable space is smaller and smaller, fast major technology bottleneck of taking pictures at this stage be how
Enough it is quickly found out clearly imaging position.
How to find clearly imaging position is the key that entire AF, and present camera mainly uses " climbing algorithm ", mistake
Journey is illustrated in fig. 1 shown below.Ordinate indicates image clearly degree FV (industry common saying Focus of the camera lens in different location
Value) value indicates, abscissa indicates the displacement (understanding to be AF code value from software respective) of camera lens.It is simple to understand
" climbing algorithm " is exactly that the motor handset image processor that often makes a move calculates the image definition of the step and the figure with one step of front
As comparing until finding clearest point.
In the prior art, focusing technique applied by production camera module is that basis produced the warp summed up in the past
It tests, when assembling camera module and being focused, by the camera lens of camera module relative to sensitive chip sinking fixed range,
With this come the climbing range for proofreading the climbing algorithm of camera module of focusing.But after the completion of this method proofreads focusing
The climbing range of camera module is unstable and causes climbing range big.
Summary of the invention
The embodiment of the present invention provides a kind of camera module focusing production technology, camera module and terminal, so that focusing
The climbing range of camera module after the completion of check and correction is more stable, to reduce camera module during automatic focusing
Climbing range.
A kind of camera module focusing production technology provided in an embodiment of the present invention, camera module include pick-up lens and
Push the voice coil motor of the pick-up lens, the camera module focusing production technology include the following: selected first pre- calibration
The clear image of the described first predetermined target is focused to the pick-up lens and exported to target;Selected second predetermined target, is opened
Moving the voice coil motor pushes the pick-up lens to carry out focusing test to the described second predetermined target, until obtaining described second
The clear image of predetermined target;The described second predetermined target is carried out in focussing process in the pick-up lens, correspondingly
Record multiple groups input the current value x of the voice coil motor and the moving distance value y of the voice coil motor;According to the pick-up lens
Because changing distance value A, the one-to-one current value x and moving distance value y caused by external environment, calculates and obtain institute
The distance value B of sinking should be corrected by stating cam lens;The pick-up lens is sunk to adjusting distance value B, and at this location will
The driving portion of the pick-up lens and the voice coil motor is solidified.
According to another embodiment of the present invention, a kind of camera module is provided.The camera module includes camera, sound
Coil motor, sensitive chip and pedestal, sensitive chip are set on the base, and the fixed part of voice coil motor is connect with pedestal, camera
It is connect with the driving portion of voice coil motor and is spaced setting between camera and sensitive chip, wherein to camera and photosensitive core
Spacing distance between piece carries out adjustment installation using camera module focusing production technology above-mentioned and is formed when carrying out adjustment.
According to still another embodiment of the invention, a kind of terminal is provided.The terminal includes shell and the intracorporal control of mounting shell
Mainboard processed, terminal further include camera module above-mentioned, and the sensitive chip of camera module is electrically connected with control mainboard, camera
The fixed part of the voice coil motor of mould group is fixedly installed after passing through shell with shell.
Using the technical solution of the embodiment of the present invention, the amendment according to required for each camera module of assembling sink away from
It is different from value B, by measuring the current value x of voice coil motor and the moving distance value y of voice coil motor corresponding with current value x,
The distance value B that amendment is sunk needed for obtaining camera module is calculated then in conjunction with variation distance value A, so that focusing be made to proofread
The climbing range of camera module after the completion is more stable, to reduce climbing of camera module during automatic focusing
Range achievees the purpose that quickly to focus, and further increases the user experience that user is quickly shot using camera module.
Detailed description of the invention
Fig. 1 is the focusing schematic diagram that climbing algorithm obtains clear image used in focusing in the prior art;
Fig. 2 be carried out for three camera modules in the prior art in focussing process the AF code value of voice coil motor and
Linear relationship chart between pick-up lens moving distance value;
Fig. 3 be the embodiment of the present invention three camera modules carry out focussing process in voice coil motor AF code value and
Linear relationship chart between pick-up lens moving distance value;
Fig. 4 is the operating procedure block diagram of the embodiment of the present invention;
Fig. 5 is the assembling structure diagrammatic cross-section of the camera module of the embodiment of the present invention;
Fig. 6 is the decomposition texture schematic diagram of the terminal of the embodiment of the present invention.
Specific embodiment
In order to which the objects, technical solutions and advantages of the embodiment of the present invention are more clearly understood, below in conjunction with attached drawing and reality
Example is applied, the embodiment of the present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used to
It explains the present invention, is not intended to limit the present invention.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or indirectly on another element.When an element referred to as " is connected to " another element, it can be with
It is directly to another element or is indirectly connected on another element.
It should also be noted that, the positional terms such as left and right, upper and lower in the present embodiment, be only each other relative concept or
It is reference with the normal operating condition of product, and should not be regarded as restrictive.
As shown in figure 4, in the present embodiment, providing a kind of camera module focusing production technology, wherein camera mould
Group includes pick-up lens and the voice coil motor for pushing the pick-up lens, selectes the first predetermined target, to the pick-up lens into
Row focus and export the described first predetermined target clear image (if pick-up lens can not export clearly image at this time,
Illustrate that the camera module is defect ware), the second predetermined target is selected, starts the voice coil motor and pushes the pick-up lens pair
The second predetermined target carries out focusing test, until the clear image of the second predetermined target is obtained, in the camera lens
Head carries out in focussing process the described second predetermined target, records the current value that multiple groups input the voice coil motor correspondingly
The moving distance value y of x and the voice coil motor, according to the pick-up lens because of external environment caused by change distance value A, one by one
The corresponding current value x and moving distance value y, the distance value B of sinking should be corrected by calculating the acquisition cam lens,
The pick-up lens is sunk to adjusting distance value B, and at this location by the driving of the pick-up lens and the voice coil motor
Portion is solidified.
The distance value B that sinking is corrected according to required for each camera module of assembling is different, by measuring voice coil motor
Current value x and voice coil motor corresponding with current value x moving distance value y, obtain then in conjunction with variation distance value A to calculate
The distance value B that amendment is sunk needed for camera module is obtained, thus the climbing model of the camera module after the completion of proofreading focusing
It encloses more stable, to reduce climbing range of camera module during automatic focusing, achievees the purpose that quickly to focus, into
One step improves the user experience that user is quickly shot using camera module.
Existing algorithm arrangement is the most mature and stable highest scheme of degree in AF algorithm, but has a more fatal defect to be:
Due to the camera module of mass production be all made of sinking fixed range carry out focusing check and correction amendment so that each camera shooting
Poor in the consistency for carrying out the climbing range in climbing focussing process using climbing algorithm between head mould group, need to climb search
Time is longer, and the range for being accurately described as needing to climb search is longer, and nearly 2/3 search range is all invalid.Such as Fig. 2
It is shown, for example: such as 1# camera module camera lens, which is moved to the AF code value for most nearby corresponding to and demarcating from farthest, is
600~1000,2# camera module camera lens are moved to the AF code value 300~700 for most nearby corresponding to calibration from farthest, and
3# camera module camera lens is moved to most that nearby the AF code value of corresponding calibration is 100~500 from farthest, in order to make this three
A camera all guarantees to focus clearly in all distances, and cell phone software, which will go to 1000code from 100, can just cover this
Three cameras.
In the embodiment of the present invention, during carrying out assembly check and correction to the camera module of mass production, by right
The method of each camera module application embodiment of the present invention carries out independent amendment adjustment, realizes each camera module
It is in consistent climbing range intervals when being focused during taking pictures using climbing algorithm, i.e., so that each camera
AF code value (i.e. shown in Figure 2 three in the prior art of mould group required adjustment when being moved to most nearby from farthest
Before camera module corresponding to the N value range that should be adjusted between maximum distance and minimum distance, be reduced to as shown in Figure 3
It is other three application the embodiment of the present invention in process production camera modules before correspond to maximum distance and recently
The N ' value range that should be adjusted between distance) control the climbing step unified between each camera module to a very small extent
Number reduces in each camera module to improve the climbing consistency of the climbing algorithm between each camera module
The AF code range and then raising AF focusing speed searched for required for the climbing algorithm of setting.
In the present embodiment, the distance value A changed herein is because the material of camera module is due to the factors such as absorb heat, absorb water
And at least one of expansion distance and the tolerance distance generated in an assembling process caused by expanding, thus need mirror
Head rotation sink, by the pick-up lens sink adjustment distance value B after, using solidified glue to the voice coil motor with it is described
Pick-up lens is solidified, to offset the focusing deviation that camera module is generated due to material expansion.
Specifically, according to the multiple groups of record input the voice coil motor current value x and the voice coil motor movement away from
From value y, the linear gradient value obtained between current value x and moving distance value y is calculated, and according to variation distance value A and the line
Property slope value, calculate and obtain the cam lens and should correct the distance value B of sinking.
As shown in figure 4, generally complete the embodiment of the present invention process need sequentially complete Fig. 4 in S1, S2,
S3, S4, S5 and S6.In Fig. 4, maximum distance and minimum distance respectively refer to apart from camera module it is farthest can obtain it is clear
The distance of the distance of the object of clear image and the object that can get a distinct image nearest apart from camera module.
In general focus process, using the eye's optics image-forming principle of people, after object is more than certain distance range,
The imaging variation of object is not obvious, and therefore, the camera module is located on focusing position, the focusing position and described the
The distance between one predetermined target is more than or equal to preset distance L1, such as preset distance L1=5m.That is, for the view of people
For power optical imagery, object imaging and object imaging apart from people 10m apart from people 5m or so clarity for
Be for people's eyesight it is essentially identical, therefore, by this effect apply camera module design assembly test process in.
Specifically, the focusing position, the first predetermined target and the second predetermined target three is parallel in the vertical direction sets
It sets.Also, central point, the central point of the first predetermined target and the central point of the second predetermined target for position of focusing are respectively positioned on same
On horizontal linear.At this point, camera module is placed on tune first during staff focuses to camera module
Section is set, and the adjusting that the first target carries out remote focal length is then placed.When camera module and the first target complete focusing behaviour
After work, keeps camera module motionless on focusing position at this time, then place the adjusting that the second target carries out short distance focal length.
Alternatively, the central point of the central point of the first predetermined target and the second predetermined target not on same horizontal linear and
It is arranged in a staggered manner.At this point, the position of the first target and the second target remains unchanged in carrying out focussing process.In camera module
When being focused at a distance relative to the first target, in the camera module and the first target of the center of mobile focusing position
Heart point is then focused at a distance on same level straight line.After the completion of remote focusing, the mobile focusing position of staff
The central point of the camera module for the center set and the second target then carries out short distance focusing on same level straight line.
The distance between the second predetermined target and the focusing position are more than or equal to preset distance L2, such as pre- spacing
From L2=5cm, that is to say, that camera module can image clear image minimum range be 5cm object (object with
The distance of pick-up lens, object pick-up lens of the distance less than 5cmm can not all image clearly).
The embodiment of the present invention is by combining the code value of camera lens sinking distance and motor AF in focussing process, effectively
The problem that AF code deviation is big as caused by monomer deviation between camera lens and motor material is eliminated, so that project is in volume production
The consistency of stage camera AF code value greatly reduces the auto-focusing time that mobile phone needs during taking pictures.
As shown in figure 5, according to another embodiment of the present invention, providing a kind of camera module.The camera module packet
Include camera 10, voice coil motor 20, sensitive chip 30 and pedestal 40.Sensitive chip 30 is arranged on the base 40 it, specifically, photosensitive
Chip 30 can be by glue fixed bonding on the base 40 it.The fixed part of voice coil motor 20 passes through solidified glue 60 and pedestal 40
Connection, camera 10 and the driving portion of voice coil motor 20 connect by solidified glue 60 and camera 10 and sensitive chip 30 it
Between be spaced setting, specifically, be provided with boss 41 on pedestal 40, the fixed part of voice coil motor 20 and the boss 41 pass through solidification glue
Water 60 connects, so that camera 10 be made to be spaced apart with sensitive chip 30.Wherein, between camera 10 and sensitive chip 30
Adjustment installation is carried out using camera module focusing production technology above-mentioned when spacing distance carries out adjustment and is formed.
In the camera module of the embodiment of the present invention, optical filter 50 is provided between camera 10 and sensitive chip 30,
It will be filtered through the incident light of camera 10 by optical filter 50, to enable to obtain color in sensitive chip 30 more beautiful
Image, optical filter 50 is fixed on the base 40 it.
After camera module assembly is completed, as shown in figure 5, passing through connection cable 70 for the camera module and mobile phone
Mainboard in mainboard is electrically connected, to be controlled by the processor MCU in mobile phone camera module.
Terminal provided by according to embodiments of the present invention.As shown in fig. 6, the terminal includes shell 101, control mainboard 102
And camera module above-mentioned, control mainboard 102 are mounted in shell 101, the sensitive chip 30 of camera module and control
Mainboard 102 is electrically connected, and the fixed part of the voice coil motor 20 of camera module passes through shell along dotted arrow direction shown in Fig. 6
It is fixedly installed between shell 101 by glue after 101.Using the technical solution of the embodiment of the present invention, so that different terminals
It can guarantee the camera for ensuring different terminals during taking pictures using camera module provided in an embodiment of the present invention
The consistency of the climbing range of climbing algorithm between mould group, to reduce the climbing range of climbing algorithm setting to be rapidly achieved
The purpose of focusing.The terminal of the embodiment of the present invention can be also possible to tablet computer with mobile phone, can also be that band is taken pictures camera function
Electronic mobile device.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.
Claims (6)
1. a kind of camera module focusing production method, which is characterized in that camera module includes described in pick-up lens and promotion
The voice coil motor of pick-up lens, the camera module focusing production method include:
Selected first predetermined target, is focused to the pick-up lens and is exported the clear image of the described first predetermined target;
Selected second predetermined target starts the voice coil motor and the pick-up lens is pushed to adjust the described second predetermined target
Coke test, until obtaining the clear image of the second predetermined target;
The described second predetermined target is carried out in focussing process in the pick-up lens, is recorded described in multiple groups input correspondingly
The current value x of the voice coil motor and moving distance value y of the voice coil motor;
According to the pick-up lens because of external environment caused by change distance value A, the one-to-one current value x and the shifting
Dynamic distance value y, the distance value B of sinking should be corrected by calculating the acquisition pick-up lens;
The pick-up lens is sunk to adjusting distance value B, and at this location by the pick-up lens and the voice coil motor
Driving portion is solidified.
2. camera module focusing production method as described in claim 1, which is characterized in that variation distance value A is camera shooting mould
At least one of the expansion distance of the material generation of group and tolerance distance.
3. camera module focusing production method as described in claim 1, which is characterized in that input institute according to the multiple groups of record
State the current value x of voice coil motor and the moving distance value y of the voice coil motor, calculate obtain current value x and moving distance value y it
Between linear gradient value calculate and obtain the pick-up lens and should correct down and according to the variation distance value A and linear gradient value
Heavy distance value B.
4. camera module focusing production method as described in claim 1, which is characterized in that the pick-up lens sinks to adjusting
After whole distance value B, the voice coil motor and the pick-up lens are solidified using solidified glue.
5. a kind of camera module, which is characterized in that including camera, voice coil motor, sensitive chip and pedestal, the photosensitive core
Piece is arranged on the base, and the fixed part of the voice coil motor is connect with the pedestal, the camera and the voice coil horse
The driving portion connection reached and interval setting between the camera and the sensitive chip, wherein to the camera and institute
The spacing distance between sensitive chip is stated to carry out applying camera module tune described in any one of Claims 1-4 when adjustment
Burnt production method carries out adjustment installation and is formed.
6. a kind of terminal, which is characterized in that the terminal includes shell and is mounted on the intracorporal control mainboard of the shell, the terminal
It further include camera module described in claim 5, the sensitive chip of the camera module is electrically connected with the control mainboard,
The fixed part of the voice coil motor of the camera module is fixedly installed after passing through the shell with the shell.
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CN107643579B (en) * | 2017-09-05 | 2020-05-12 | 江西合力泰科技有限公司 | Method for improving focusing consistency of camera |
CN108344356A (en) * | 2017-12-29 | 2018-07-31 | 江西合力泰科技有限公司 | A kind of method actively carrying out motor precision calibration |
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CN109788282B (en) * | 2019-03-19 | 2020-07-07 | 深圳市同为数码科技股份有限公司 | Adjusting method of automatic focusing device for camera lens |
CN112116662A (en) * | 2019-06-20 | 2020-12-22 | 上海炬佑智能科技有限公司 | Camera is rectified and is used equipment |
TWI769465B (en) * | 2019-08-14 | 2022-07-01 | 大陸商廣州立景創新科技有限公司 | Optical imaging apparatus with adjustable focal length |
CN111711813B (en) * | 2020-05-29 | 2021-08-27 | 重庆盛泰光电有限公司 | Method for testing AA optimal sinking parameter in camera module |
CN111491107B (en) * | 2020-06-24 | 2020-10-16 | 支付宝(杭州)信息技术有限公司 | Voice coil motor stroke calibration method, device and equipment |
CN111770278B (en) * | 2020-07-31 | 2022-05-20 | 盛泰光电科技股份有限公司 | Camera module automatic focusing system based on turntable |
CN113452917B (en) * | 2021-07-06 | 2023-04-25 | 信利光电股份有限公司 | Front-back shared camera automatic focusing method and system |
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